Updraft-furnace.



0. D. DEVIS. UPDRAFT FUBNAOB. unmrrlon 111.1111 110111, 1901. nrmnwnn Dnc. 14, 190s.

Patented July 27, 1909.

Aa suma-SHEET 1.

gmuenlfoz 0. D. ORVIS. UPDRAFT FUBNAE. grumman FILED NovA n, 1907. nnnnwsn DBO. 14, 190g.

929,624. Patented July 27, 1909.

3 SHEETS-SHEET 3.

@OOO OOOO OOOO OOOO OOOO OOOO OOOO OOOO OOOO OOOO 1 By means of this. construction, all smoke is consumed, the Water is rapidly heated und es rapidly circulated and the general efficiency of the furnace and the boiler greatly rear ends of the said incline( increased.

What I claim is.

1. In an updraft furnace the combination of a boiler, e irebox below the sume, a fire brick well et the rear of seid firebox, n, transverse square heeder supported in seid well, a second square header supported in the front wall of the furnace, inclined Water tubes connecting said headers, arched retorts above and supported b the said inclined tubes, the said retorts eing located about midway between the front furnace wall und the said fire brick Wall, e transverse jet pipe, jets in saiddpipe adapted to eject fresh hot, air into en through said retorts, connections between the said jet pipe und said boiler, a layer of bricks su ported on the l)wster tubes, s vertical well above the first mentioned square header sind connections between the said headers and the boiler.

2. In an updreft furnace the combination' of a boiler, e rebox below the sume, u fire brick well at the rear of seid iirebox, a transverse header supported in the top and to the roer oi' seid lire brick wall, u second 'header supported in the front furnace Wall, Water times connecting the seid header and 1nclined upwardly to the last mentioned one,

a plurality oi* arched retorts of e length less then the length of said tubes und having open ends 'supported by and above the seid water tubes, a ass 'e being formed between the iront 'ece said retorts und the 'front furnace wall, e layer of bricks supported above the said incldned tubes .adjacent seid fire brick wall, a pmssege being formed between the front edge of said layer of brick and the rerir face of the said retorts, a iire brick Well supported above the iirst inentioned header, e assege bein? formed above er for the exit oi' the combustible, u horizontal Well supported above said retorts and surrounding the lower half of the said boiler, jets for ejecting hot air under eteani pressure into und through the said retorts and connec tions between the s'axd heudersand the boiler.

Signed at New York this 9th dey of Nov. 1907.

' REL D. ORVIS. Witnesses:

IVAN Komessene, Oem A. Fosrnn. 

